Improvement in sewing-machines



2 Sheets--Sheet 2.

EQSHAw.-

Sewing-Machine.

Patented Oct. 15,1872.,

UNITED STATES PATENT OFEETCE.

LIJAEI SHAW, OF MILWAUKEE, WISCONSIN.

IMPROVEMENT iN SEWING-MACHINES.

Specification forming part of Letters Patent No. 132,326, dated October 15, 1872.

N cltnre anal Object of the Invention.

My invention consists in an arrangement of adjustable awls and hooked needles supplied with thread by a double-thread'guide, and operatin g, in connection with a cord and lapseam guide, to overlap the material and sew p'arallel linesfof stitches.

Description ofthe Drawing forming part of this Specification.

Figurel is a perspective view of this machine; Fig. 2, a view of adjustable needles and loop-carriage; Fig. 3, a sectional View of adjustable needles and loop-carriage; Fig. 4, a sectional view of the other half of needles and loop-carriage; Fig. 5 is a View ot the awlbar with adjustable aWl-fastenings; Fig. 6 is a view of the awl-bar; Fig. 7, the adjustable thread-caster; Fig. 8, the adjustable foot; Fig. 9, halt' of needle-plate; Fig. l0, other half of needle-plate; Fig. 11, lap-seam and cordgage.

General Description.

A is the frame of the machine. balance-wheel. C is the crank. D is the needle and looper arm. E is the awl-arm F, the thread-spool; Gr, tension-rollers; H, thread-guides; I, tension-springs; K, threadcaster bar; L, thread-caster; M, the awls; N, needles; O, lap-seam and cord-gage; P, end gage; Q and R, needle-plates; S, adjustable foot; T, set-screws, which hold adjustable needle-carriage in place; U U are cast-offs; V, adjustable awl-holder; W, adjustable co1- lar or awl bar; X X, guide-pins to the cast-off and needle-bars; Y, screw for adjusting the needles and cast-oils the proper distance apart 3 Z, a screw for attaching the needle and looper carriageto the feed-bar; n, set-screw to adjust the thread-caster the proper height; b, set-screw for setting awlsA in the holder; c, set-screw for adj usting movable awl-holder;

B is the d, set-screw to adjust the foot to the proper width; e, needle-bar; f, set-screw to hold awl in awl-bar; g, set-screw for setting lap-seam gage; h h, slides for adjusting needle-boards; lz', slots in needle-board for the needles and awls to pass through; h, slots in which the v I slides h move; n1, m, set-screws for fastening cast-offs in their sockets; n, screws for adjusting cast-offs to the needles; o, set-screws for setting needles in the needle-bars; p p, screws which hold a dovetail piece between needle and cast-0E bars to hold them in their places;

q, a set-screw Whichholds foot in bar; r, holes for guide-pins X X; t, loop and needle carriage.

Operation.

Byl turning the crank the cams give motion to different parts of the machine. The awls pass down and pierce the holes in the leather, the thread being properly adjusted in the threadcarrier. When the needles have passed up to the proper height the thread-carrier will throw the thread over the barbs of the needles, the needles then passing down uutil their points come even with the points of the cast-offs. Then they and the needles passv down together until they get a proper distance below theneedle-board to form the loop. These needles, awls, and cast-offs operate upon the thread in the usual manner. The gage is adjusted to lap the lmaterial the proper width, the edge ofthe material placed in the slots of the guide,and a cord or other llling in the hole in the guide. The machine may then be started, and the bootleg or other article will be sewed by two seams, with edges overlapped and raised between the same.

Claim.

I claim as my invention- The double thread-carrier, the double press .er-foot, the two awls, needles, and cast-off, 

